A graphic showing the sequence of the depraved van attack in Barcelona

It has been reported he denied blame and told investigating officers his brother Moussa, 17, stole his ID.

The brothers, their father Said, and two of their other siblings – including a 16-year-old girl – are being probed over their involvement, El Confidencial reports.

A neighbour of the family today described Moussa Oukabir as “a normal, nice boy”.

The five attackers gunned down by cops in Cambrils are also presumed to be among the 15.

Police have now said one of that group could have been the driver of the van which killed 13 people in Barcelona.

WHAT WE KNOW SO FAR

At 5pm on Thursday, a white Fiat van ploughed into a crowd in tourist hotspot Las Ramblas in Barcelona

At least 13 people were killed and 130 more injured as the driver mowed down innocents along a 500m stretch of the packed pedestrian area

The driver then fled the carnage on foot and a manhunt was launched

Spain’s Prime Minister Mariano Rajoy said the van attack was a result of ‘jihadist terrorism’ and ISIS has since claimed responsibility

At least four men with no background in terrorism have been arrested in connection with the attack including Driss Oukabir – a 28-year-old Moroccan who is believed to have rented the van. His brother Moussa Oukabir, 17, stole his ID and is suspected to be the van driver

Victims are from 34 countries. A seven-year-old British boy is feared to be among the victims as Theresa May says she is “urgently” looking into reports

Eight hours later, one person was killed and seven injured after five terrorists carry out second terror attack in Cambrils – 68 miles from Barcelona

Jihadists wearing fake suicide vests rammed an Audi A3 into pedestrians and were shot dead by police when the car flipped

One of the five terrorists, who were armed with knives and axes, killed in Cambrils could have been the driver of the van which killed 13 people in Barcelona

Officials are linking the attacks with an explosion that killed one person at a house 124 miles away from Las Ramblas on Wednesday as it emerges the terrorists could have been part of a cell involving eight to 12 people

We pay for your stories! Do you have a story for The Sun Online news team? Email us at tips@the-sun.co.uk or call 0207 782 4368 . We pay for videos too. Click here to upload yours.